div.border {
    margin: 0 auto;
}

.border {
    border-radius: 10px;
    width: 80%;    
    text-align: center;
}

.ttr_index_html_row2 {
    justify-content: center;
    margin: 5px;
}

.card.mb-3 {        
    margin: 5px;
    padding: 5px;        
    align-items: center;
    border: solid 3px; 
    border-radius: 10px;
}

.card-title {
    font-size: 25px;
    text-align: center;
}

.card-text {
    font-size: 1.429em;
    text-align: center;
    color:rgba(52,52,52,1);
}